CMI - SEA

$348 Find Cheap Flights from Champaign to Seattle

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Champaign to Seattle departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Champaign to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Champaign to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$348
American Airlines
Wed 4/15Sat 4/18
CMI - SEA • 1 stop
Cheapest one-way
$569
American Airlines
Sat 1/3
CMI - SEA • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Champaign to Seattle (CMI-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Champaign to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Champaign to Seattle

Wed, Apr 15 - Sat, Apr 18
American Airlines Logo
6:44 pm - 11:05 pm
CMI
-
SEA
6h 21m1 stop
American Airlines Logo
11:51 am - 9:29 pm
SEA
-
CMI
7h 38m1 stop
$348American Airlines
Fri, May 29 - Sat, Jun 6
American Airlines Logo
3:02 pm - 7:20 pm
CMI
-
SEA
6h 18m1 stop
American Airlines Logo
1:31 pm - 9:34 pm
SEA
-
CMI
6h 03m1 stop
$570American Airlines
Wed, Apr 15 - Sat, Apr 18
American Airlines Logo
11:33 am - 7:48 pm
CMI
-
SEA
10h 15m2 stops
American Airlines Logo
5:47 am - 2:26 pm
SEA
-
CMI
6h 39m1 stop
$791American Airlines
Fri, May 29 - Fri, Jun 5
American Airlines Logo
3:02 pm - 12:10 am
CMI
-
SEA
11h 08m1 stop
American Airlines Logo
1:38 am - 2:03 pm
SEA
-
CMI
10h 25m2 stops
$894American Airlines
Wed, Apr 15 - Sat, Apr 18
American Airlines Logo
11:33 am - 7:48 pm
CMI
-
SEA
10h 15m2 stops
American Airlines Logo
10:01 am - 9:29 pm
SEA
-
CMI
9h 28m2 stops
$911American Airlines
Fri, May 29 - Fri, Jun 5
American Airlines Logo
3:02 pm - 10:54 pm
CMI
-
SEA
9h 52m2 stops
American Airlines Logo
1:38 am - 2:03 pm
SEA
-
CMI
10h 25m2 stops
$979American Airlines
Booking Insights

KAYAK's insights & trends for Champaign to Seattle flights

Get data-powered insights and trends into flights from Champaign to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Champaign to Seattle?

The average price of all round-trip flights from Champaign to Seattle clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seattle on a Saturday and more expensive on a Friday. On your return trip to Champaign, you should consider flying back on a Thursday, and avoid Tuesdays for better deals.

Find deals

Good to know

Low seasonMarch
Cheapest flight$348
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Champaign to Seattle

When to book flights from Champaign to Seattle

Are your dates flexible? Find out the best times to travel from Champaign to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Champaign to Seattle

  • What is the cheapest flight from Champaign to Seattle?

    In the last 3 days, the lowest price for a flight from Champaign to Seattle was $569 for a one-way ticket and $348 for a round-trip.

  • Do I need a passport to fly between Champaign and Seattle?

    A passport is not required to fly from Champaign to Seattle.

  • Which airports will I be using when flying from Champaign to Seattle?

    When flying out of Champaign you will be using Champaign University-Willard. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Champaign to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Champaign to Seattle?

    oneworld is the only airline alliance operating flights between Champaign and Seattle.

  • How does KAYAK find such low prices on flights from Champaign to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Champaign to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Champaign to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Champaign is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Champaign to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Champaign with another airline. Booking your flights between Champaign and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Champaign to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Champaign up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Champaign to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Champaign to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Champaign to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11055 reviews
7.5Boarding
6.9Entertainment
6.5Food
7.2Comfort
8.0Crew
Airline reviews

We loved the steward on the plane. He made the night enjoyable

10.0 Excellentchloe, Nov 2025
ORD - ATW
Read more American Airlines reviews

We loved the steward on the plane. He made the night enjoyable

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

The plane was late, when we did board the plane was as cold as a freezer. I was freezing the entire flight, no blankets. Lost miserable flight I’ve ever had.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

After a two hour delay, my flight was CANCELLED! No pilot available. Such BS.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

Everything you need to know for your flight from Champaign to Seattle

Information on your arrival and departure airports

Champaign (CMI)
Seattle (SEA)